The Thermory Herringbone Decking Installation Guide (2024 PDF) provides complete instructions for installing Thermory’s modular herringbone decking system. Made from Benchmark Ash, Herringbone by Thermory decking offers exceptional stability, rot resistance, and a unique geometric design that installs far faster than traditional herringbone layouts.
The guide begins with board storage and acclimation requirements. Decking should be kept dry, shaded, elevated at least 6″ from the ground, and protected with a waterproof, light-impermeable cover. Thermory stresses not to store modules in rain or excess moisture, and to acclimate materials on-site before installation.
Framing guidelines emphasize proper drainage and airflow. Joists must be level, spaced precisely according to the herringbone module grid, and framed using No.1 KDAT or fiberglass joists. Decking must sit at least 4″ above grade, with open sides or gapped fascia to maintain airflow and prevent moisture trapping. Thermory recommends covering joist tops with butyl tape for added protection.
Joist positioning is one of the most critical steps. The guide provides exact joist layout dimensions in both millimeters and inches, including the required **500+500+900 mm (1’7 11/16″ + 1’7 11/16″ + 2’11 7/16″)** sequencing needed for modules to align correctly. Installers are advised to dry-lay one row before cutting joists to verify spacing.
Installation instructions show how main modules, starter modules, and end caps interlock to create a consistent herringbone pattern. Each module receives stainless-steel screws (included in the boxes), with diagrams showing screw placement and the required 3/16″ spacing between seams. Starter and end-cap modules ensure clean row transitions at both ends of the deck.
Edge finishing options allow installers to close exposed herringbone edges using 3×0.79″ strips and pre-designed corner treatments. The guide also covers using leftover starter-module pieces on the opposite side and ensuring the final perimeter board mounts flush.
Maintenance instructions note that thermally modified wood will slowly gray outdoors unless maintained with UV-resistant pigmented oil. The guide explains how to keep decking free of moisture-retaining debris and offers coating recommendations for preserving color.
A full module quantity chart is included to calculate how many boxes of main modules, starter pieces, and end caps are required for various deck sizes.
Download the complete Thermory Herringbone Decking Installation Guide (2024 PDF) for all framing diagrams, module layouts, fastening instructions, and maintenance guidance. TimberTown is here to support your Thermory decking project from planning to completion.
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